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US 2014/0066646 A1Published application
1,3,2-Dioxaphosphorinane, 2-Sulfide Derivatives For Use As Anti-Wear Additives In Lubricant Compositions
AssigneeAfton Chemical Corporation
InventorsJohn Marshall Baker, Naresh Mathur, Roger M. Sheets, David J. Degonia
Life of this patent
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Abstract
The present disclosure relates to a non-acidic, sulfur-containing, phosphorus-containing compound of the formula I where R1, R2, R3, R4, R5, R6, and R7 are as defined herein. Such a compound may exhibit improved antiwear performance and thermal stability in lubricating compositions.
Claims4
1-25. (canceled)
A method of making a lubricant additive, comprising:
- reacting a 1,3-diol with a trialkyl phosphite to form a 1,3,2-dioxaphosphorinane;
- and
- reacting the 1,3,2-dioxaphosphorinane with elemental sulfur or an organic sulfur compound to form a 2-sulfide-1,3,2-dioxaphosphorinane.
A method of making a lubricant additive, comprising:
- reacting a 1,3-diol with a trialkyl phosphite to form a 1,3,2-dioxaphosphorinane;
- reacting the 1,3,2-dioxaphosphorinane with an alcohol to form a reaction product;
- and
- reacting the reaction product with elemental sulfur or an organic sulfur compound to form a 2-sulfide-1,3,2-dioxaphosphorinane.
1 more element
28-29. (canceled)
Dependencies are inferred from the claim text.